package com.wyw.hemerocallis.advice;

import com.wyw.hemerocallis.annotation.IgnoreResponseAdvice;
import com.wyw.hemerocallis.vo.CommonResponse;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 实现统一响应
 *
 * @author Mr Wu    yewen.wu.china@gmail.com
 * <p>
 * Update History:
 * Author        Time            Content
 */
@RestControllerAdvice(value = "com.wyw.hemerocallis")
@SuppressWarnings("all")
public class CommonResponseDataAdvice implements ResponseBodyAdvice<Object> {
    /**
     * 判断是否需要对响应进行处理
     */
    @Override
    public boolean supports(MethodParameter methodParameter,
                            Class<? extends HttpMessageConverter<?>> aClass) {
        if (methodParameter.getDeclaringClass()
                .isAnnotationPresent(IgnoreResponseAdvice.class)) {
            return false;
        }

        if (methodParameter.getMethod().
                isAnnotationPresent(IgnoreResponseAdvice.class)) {
            return false;
        }

        return true;
    }

    @Override
    public Object beforeBodyWrite(Object o, MethodParameter methodParameter,
                                  MediaType mediaType,
                                  Class<? extends HttpMessageConverter<?>> aClass,
                                  ServerHttpRequest serverHttpRequest,
                                  ServerHttpResponse serverHttpResponse) {
        //定义最终的响应对象
        CommonResponse response = new CommonResponse("0000000", "");
        if (null == o) {
            return response;
        } else if (o instanceof CommonResponse) {
            response = (CommonResponse<Object>) o;
        } else {
            response.setData(o);
        }
        return response;
    }
}
